Mechanisms of M phase progression and cytokinesis of plant cells: a relationship to asymmetric cell division

1.我们分别在烟草和拟南芥中鉴定了蛋白磷酸酶的NA 2C和AtNA 2C基因，它们可能参与胞质分裂所需的NACK-PQR途径的激活。我们最近的研究结果表明，AtNA 2C与分生组织细胞的不对称细胞分裂有关。2.为了了解拟南芥的GIG-APC途径在细胞命运决定中的作用，我们寻找了可能修饰gig 1表型的新突变体。我们发现了11种新的突变。我们的研究结果表明，GIG 1和UVI 4，GIG 1的同源物，都参与气孔发育。3.由于我们未能再现MAP 65基因家族成员参与拟南芥根的不对称细胞分裂，我们推迟了上述两种途径中基因的双突变体的实验。

1. We have identified NA2C and AtNA2C genes for protein phosphatases in tobacco and arabidopsis, respectively, which may be involved in activation of the NACK-PQR pathways that are required for cytokinesis. Results of our recent studies have suggested that AtNA2C is related to asymmetric cell division of meristematic cells. 2. For understanding of a role of the GIG-APC pathway of arabidopsis in cell fate determination, we have sought for new mutants that might modify gig1 phenotypes. We have identified 11 novel mutations. Results of our investigations suggest that GIG1 and UVI4, a homolg of GIG1, both are involved in development of stomata. 3. Since we failed to reproduce the involvement of members of the MAP65 gene family in asymmetric cell division in arabidopsis roots, we postponed experiments with double mutants of genes in the two pathways described above.